Most virtual memory schemes make use of a special high-speed cache for page table entries, called a

Virtual Memory and Page Tables

In virtual memory systems, a key component is the management of memory addresses through page tables. To enhance performance, particularly in translating virtual addresses to physical addresses, most virtual memory schemes utilize a special high-speed cache known as the Translation Lookaside Buffer (TLB).

What is a TLB?

1. Functionality: The TLB stores a limited number of page table entries that map virtual addresses to physical addresses.
2. Speed: Being a cache, it allows for faster access to page table entries, significantly reducing the time required for address translation during memory access operations.
3. Performance Improvement: By storing frequently accessed entries, the TLB minimizes the need to access the main memory page tables, which can be slower.

In summary, the Translation Lookaside Buffer is an essential component in the virtual memory management framework, allowing for speedy access to page information and improving overall system performance.